I'm all for criticism if it can drive developers to make better and better games over time and you're entitled to your opinion, but I think people are too picky these days. They expect everything to be perfect 100% of the time without fail, but that's never ever going to happen.
Personally, I just take what I can get and be thankful for it since I can't make any games myself. The energy toward nit-picking every single little detail can be better spent somewhere else for me.
Plus, the game is only in alpha just now getting ready for beta so if they really think the voices are bad they'll "fix" them by the time of launch. If they don't, then it wasn't important enough to "fix".
FFXI - Shinoh - BRD66/WHM41/RDM41/NIN37/COR30/THF25 - Fairy
WoW - Lv.80 Priest/Shaman/Paladin - Boulderfist/Malorne
FFXIV - Can't afford it now. =(